阅读说明：本技术 一种新型光电吊舱光窗安装结构及其安装方法 (Novel photoelectric pod optical window mounting structure and mounting method thereof ) 是由 张天琦 王希 刘宏旭 周建华 于昊钲 于 2021-07-01 设计创作，主要内容包括：本发明公开了一种新型光电吊舱光窗安装结构及其安装方法。所述安装结构包括光窗,用于安装光窗并连接光电吊舱安装基座的接口件,以及用于对光窗与接口件的安装部位进行紧固的压圈。本发明设计的密封胶槽充填硅橡胶,增强了光窗与接口件之间的气密与连接。压圈外侧面采用流线型设计,可有效降低空气阻力。本发明结构轻便、可靠,特别适用于对载荷质量有严格要求的轻小型无人机。本发明安装方法操作简单,所述光窗、压圈及接口件之间采用止口配合连接,部件间同轴度高,对光窗的安装应力小,可以保证吊舱整体的气密性、可靠性和抗冲击性能。(The invention discloses a novel photoelectric pod optical window mounting structure and a mounting method thereof. The mounting structure comprises an optical window, an interface piece and a pressing ring, wherein the interface piece is used for mounting the optical window and connecting the photoelectric pod mounting base, and the pressing ring is used for fastening the mounting positions of the optical window and the interface piece. The sealing rubber groove designed by the invention is filled with silicon rubber, so that the air tightness and connection between the optical window and the interface piece are enhanced. The outer side surface of the pressing ring adopts a streamline design, so that the air resistance can be effectively reduced. The invention has light and reliable structure, and is particularly suitable for light and small unmanned aerial vehicles with strict requirements on load quality. The installation method is simple to operate, the optical window, the pressing ring and the interface piece are connected in a matched mode through the seam allowance, the coaxiality of the parts is high, the installation stress on the optical window is small, and the integral air tightness, reliability and impact resistance of the nacelle can be guaranteed.)

1. The novel photoelectric pod optical window mounting structure is characterized by comprising an optical window (1), an interface piece (3) and a pressing ring (2), wherein the interface piece (3) is used for mounting the optical window (1) and is connected with a photoelectric pod mounting base, and the pressing ring (2) is used for fastening the mounting positions of the optical window (1) and the interface piece (3).

2. The mounting structure according to claim 1, wherein the optical window (1) comprises an optical window body (10), a mounting boss (11) provided outside the open end of the optical window, a conical mounting and positioning surface (12) inside the open end of the optical window, and a press ring mounting and mating surface (13) outside the open end of the optical window.

3. The mounting structure according to claim 2, wherein the clamping ring (2) is annular as a whole, the upper part of the inner side of the clamping ring is a conical optical window crimping fitting surface (21), the lower part of the inner side of the clamping ring is a cylindrical connecting and fastening surface (24), and an optical window boss crimping surface (23) is arranged at the transition of the conical optical window crimping fitting surface (21) and the cylindrical connecting and fastening surface (24); the upper part of the outer side of the pressing ring (2) is provided with a conical transitional finishing surface (22).

4. A mounting arrangement according to claim 3, characterised in that the interface (3) is generally cylindrical with one end being an optical window mounting end and the other end being a base connection end; the top end part of the outer side surface of the optical window mounting end is a conical optical window mounting matching surface (31); a light window mounting and positioning surface (33) which transversely protrudes out of the light window mounting and matching surface (31) is arranged below the light window mounting and positioning surface; a first sealing groove structure step (34) which transversely protrudes out of the optical window installation positioning surface (33) is arranged below the optical window installation positioning surface (33); a pressing ring mounting surface (35) is arranged below the first sealing groove structure step (34), and a screw hole for fastening the pressing ring (2) and the interface piece (3) is radially arranged on the pressing ring mounting surface.

5. The mounting structure according to claim 4, wherein a second annular seal groove (32) is provided on the optical window mounting mating face (31) of the interface member (3).

6. The mounting arrangement, as set forth in any of claims 1 to 5, characterized in that the clamping ring (2) is fixed to the outer side of the interface element (3) with a bayonet fitting and is fastened with screws.

7. The mounting structure according to any one of claims 1 to 5, wherein the optical window (1) is made of an optical resin material, and the pressing ring (2) and the interface member (3) are made of an aluminum alloy.

8. A method of mounting a mounting structure according to any one of claims 1 to 4, comprising the steps of:

step S1, aligning the conical installation positioning surface (12) on the optical window (1) with the optical window installation matching surface (31) on the interface piece (3), and then installing the optical window (1) in place;

step S2, completely filling a first sealing groove formed by the lower surface of the mounting boss (11) and a first sealing groove construction step (34) on the interface member (3) with silicon rubber, and then standing for a period of time until the silicon rubber is completely cured;

step S3, the optical window crimping matching surface (21) on the pressing ring (2) is perfectly matched with the pressing ring mounting matching surface (13) on the optical window (1), and then the pressing ring (2) is mounted in place;

and step S4, installing a slotted countersunk head screw on the connection fastening surface (24) of the pressing ring (2) to connect and fasten the pressing ring (2) and the interface piece (3), thereby completing installation.

9. A method of mounting a mounting structure according to claim 6, comprising the steps of:

step S1, completely filling the second annular sealing groove (32) on the interface piece (3) with silicon rubber;

step S2, aligning the conical installation positioning surface (12) on the optical window (1) with the optical window installation matching surface (31) on the interface piece (3), and then installing the optical window (1) in place;

step S3, completely filling a first sealing groove formed by the lower surface of the mounting boss (11) and a first sealing groove construction step (34) on the interface member (3) with silicon rubber, and then standing for a period of time until the silicon rubber is completely cured;

step S4, the optical window crimping matching surface (21) on the pressing ring (2) is perfectly matched with the pressing ring mounting matching surface (13) on the optical window (1), and then the pressing ring (2) is mounted in place;

and step S5, installing a slotted countersunk head screw on the connection fastening surface (24) of the pressing ring (2) to connect and fasten the pressing ring (2) and the interface piece (3), thereby completing installation.

10. A method of mounting a mounting structure according to claim 7, comprising the steps of:

step S1, completely filling the second annular sealing groove (32) on the interface piece (3) with silicon rubber;

step S2, aligning the conical installation positioning surface (12) on the optical window (1) with the optical window installation matching surface (31) on the interface piece (3), and then installing the optical window (1) in place;

step S3, completely filling a first sealing groove formed by the lower surface of the mounting boss (11) and a first sealing groove construction step (34) on the interface member (3) with silicon rubber, and then standing for a period of time until the silicon rubber is completely cured;

step S4, the optical window crimping matching surface (21) on the pressing ring (2) is perfectly matched with the pressing ring mounting matching surface (13) on the optical window (1), and then the pressing ring (2) is mounted in place;

and step S5, installing a slotted countersunk head screw on the connection fastening surface (24) of the pressing ring (2) to connect and fasten the pressing ring (2) and the interface piece (3), thereby completing installation.

Technical Field

The invention belongs to the field of machinery, and particularly relates to a mounting structure and a mounting method of an optical window of a light and small airborne photoelectric pod.

Background

With the development of unmanned aerial vehicle technology, especially the wide application of small unmanned aerial vehicles makes the development prospect of light and small airborne photoelectric pod for unmanned aerial vehicles become wider.

When the light and small airborne photoelectric pod for the unmanned aerial vehicle is designed in a mechanical structure, the installation interface and the structural form of the optical window are one of key technologies for ensuring the air tightness and the reliability of the pod. According to the shape difference of the optical window, the structure form of the installation interface can be divided into a flat optical window installation interface and a special-shaped optical window installation interface.

The method for installing the interface by adopting the flat optical window comprises the following steps: the photoelectric load is arranged in an independent spherical cabin on a U-shaped frame of the pitching shaft, the size of an optical window is matched with the optical caliber design of the photoelectric load, a pressing plate or a pressing ring is adopted to be fixed on an optical window seat of the spherical cabin, and sealing is carried out by using sealant. The advantage of this method is that the three shafts of the nacelle and the load compartment are sealed independently, and the disadvantage is that the volume and weight are large.

The method for installing the interface by adopting the special-shaped optical window comprises the following steps: the photoelectric load and the rotary table shaft system structure are arranged below the special-shaped optical window and the optical window mounting structure and are completely covered. The optical window and the optical window interface are generally fixed by adopting double fixation of sealant and mechanical crimping. The shaped optical window is mainly divided into a crown hemisphere, a super hemisphere and other shapes, wherein the crown shaped optical window is most commonly used. The method has the advantages of small volume and light weight, but the optical window generally adopts a crown-shaped optical window, so that the installation structure is more complicated and the observation range of the photoelectric system is limited.

Therefore, the existing pod light window installation form causes that the size and the weight of the pod are limited, the structure is not compact, or the installation structure is complex, the observation range is influenced, and the requirements of the photoelectric pod with compact and light structure cannot be met.

Disclosure of Invention

The embodiment of the invention provides a novel photoelectric pod optical window mounting structure and a mounting method thereof, which are used for solving the defects of complex mounting structure and limited observation range of the existing crown-shaped pod optical window, and have compact and light structure and larger observation range of a photoelectric system.

The novel photoelectric pod optical window mounting structure provided by the embodiment of the invention comprises an optical window, an interface piece and a pressing ring, wherein the interface piece is used for mounting the optical window and connecting a photoelectric pod mounting base, and the pressing ring is used for fastening the optical window and the mounting part of the interface piece.

The optical window comprises an optical window main body, an installation boss arranged on the outer side of the open end of the optical window, a conical installation positioning surface on the inner side of the open end of the optical window, and a pressing ring installation matching surface on the outer side of the open end of the optical window.

The pressing ring is in a ring shape as a whole, the upper part of the inner side of the pressing ring is a conical optical window compression joint surface, the lower part of the inner side of the pressing ring is a cylindrical connection fastening surface, and an optical window boss compression joint surface is arranged at the transition position of the conical optical window compression joint surface and the cylindrical connection fastening surface; the upper part of the outer side of the pressing ring is provided with a conical transitional finishing surface. The aerodynamic performance of the system can be improved by the streamline design.

The interface piece is cylindrical as a whole, one end of the interface piece is an optical window installation end, and the other end of the interface piece is a base connecting end. The top end part of the outer side surface of the optical window mounting end is a conical optical window mounting matching surface, and an optical window mounting positioning surface transversely protruding out of the optical window mounting matching surface is arranged below the conical optical window mounting matching surface; a step is formed below the optical window installation positioning surface by a first sealing groove which transversely protrudes out of the optical window installation positioning surface; and a pressing ring mounting surface is arranged below the first sealing groove structure step, and a screw hole for fastening the pressing ring and the interface piece is radially arranged on the pressing ring mounting surface.

Optionally, a second annular sealing groove is further arranged on the optical window mounting matching surface so as to further enhance the air tightness and reliability of the whole nacelle.

Optionally, the pressing ring is fixed on the outer side surface of the interface member in a spigot fit manner and is fastened by screws.

Optionally, the optical window is made of an optical resin material.

Optionally, the pressing ring and the interface piece are made of aluminum alloy.

The embodiment of the invention has a light structure, and is particularly suitable for light and small unmanned aerial vehicles with strict requirements on load quality. The sealing rubber groove designed by the embodiment of the invention is filled with silicon rubber, so that the air tightness and connection between the optical window and the interface piece are enhanced. The outer side surface of the pressing ring adopts a streamline design, and the outer side surface of the optical window and the outer side surface of the interface piece are smoothly transited, so that the air resistance can be effectively reduced. In a word, the installation interface structure of the embodiment of the invention is reliable, the installation stress on the optical window is small, and the integral air tightness, reliability and impact resistance of the nacelle can be ensured. In addition, optical window, clamping ring and interface piece all can revise the size according to revolving stage and unmanned aerial vehicle outer envelope, can adapt to more extensive photoelectric pod system, and simple structure, the dress of being convenient for is transferred, easily mass production.

The embodiment of the invention provides a method for installing a novel photoelectric pod optical window installation structure, which is as described above, and comprises the following steps:

step S1, aligning the conical installation positioning surface on the optical window with the optical window installation matching surface on the interface, and then installing the optical window in place, namely, the installation boss on the optical window is flatly dropped on the optical window installation positioning surface on the interface;

step S2, completely filling the first sealing groove formed by the lower surface of the mounting boss and the first sealing groove structure step on the interface member with silicone rubber, and standing for a period of time after the completion of the filling of the first sealing groove structure step until the silicone rubber is completely cured;

step S3, matching the optical window crimping fitting surface on the pressing ring with the pressing ring mounting fitting surface on the optical window, and then mounting the pressing ring in place, namely, the optical window boss crimping surface on the pressing ring is smoothly dropped on the mounting boss on the optical window;

and step S4, installing a slotted countersunk head screw on the connection fastening surface of the pressing ring to connect and fasten the pressing ring and the interface piece, thereby completing the installation.

Alternatively, 704 black silicone rubber is used as the silicone rubber.

The installation method is simple to operate, the optical window, the pressing ring and the interface piece are connected in a matched mode through the spigot, the cylindrical surfaces matched with the spigot are sealed and bonded through the silicon rubber, the coaxiality of the components is high, the installation stress on the optical window is small, and the integral air tightness, reliability and impact resistance of the nacelle can be guaranteed.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic view of an optical window interface structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of an optical window structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of a pressing ring structure according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an interface member according to a first embodiment of the present invention;

FIG. 5 is a cross-sectional view of the optical window and the interface assembly according to the first embodiment of the present invention;

FIG. 6 is a cross-sectional view of the first embodiment of the present invention after installation;

fig. 7 is a schematic structural diagram of an interface according to a second embodiment of the invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The first embodiment of the invention provides a novel photoelectric pod optical window mounting structure. As shown in fig. 1, the novel photoelectric pod optical window mounting structure comprises an optical window 1, an interface piece 3 used for mounting the optical window 1 and connecting a photoelectric pod mounting base, and a pressing ring 2 used for fastening the mounting positions of the optical window 1 and the interface piece 3.

Referring to fig. 2, the optical window 1 includes an optical window main body 10, a mounting boss 11 disposed outside an opening end of the optical window, a conical mounting and positioning surface 12 inside the opening end of the optical window, and a pressing ring mounting and matching surface 13 outside the opening end of the optical window. The optical window 1 is a crown-shaped optical window, and can be hemispherical or hyper-hemispherical. The mounting and positioning surface 12 is designed to be a conical surface, and can meet the requirements of optical window processing manufacturability and assembling manufacturability. In some embodiments, the optical window 1 is made of an optical resin material.

Referring to fig. 3, the pressing ring 2 is annular as a whole, the upper part of the inner side of the pressing ring is a conical optical window press-fit surface 21, the lower part of the inner side of the pressing ring is a cylindrical connection fastening surface 24, the conical optical window press-fit surface 21 is closer to the axis of the pressing ring 2 than the cylindrical connection fastening surface 24, and an optical window boss press-fit surface 23 is formed at the transition position of the conical optical window press-fit surface 21 and the cylindrical connection fastening surface 24; the outer upper part of the clamping ring 2 is provided with a conical transition finishing surface 22, so that a streamline design is formed, and the aerodynamic performance of the system is improved. In some embodiments, the clamping ring 2 is made of an aluminum alloy, such as 7075 aluminum alloy.

Referring to fig. 4, the interface 3 is cylindrical as a whole, and has one end serving as an optical window mounting end and the other end serving as a base connecting end. The top end part of the outer side surface of the optical window mounting end is a conical optical window mounting matching surface 31, and a second annular sealing groove 32 is arranged on the optical window mounting matching surface 31; the lower part of the light window mounting matching surface 31 is a light window mounting positioning surface 33 which transversely protrudes out of the light window mounting matching surface 31; a first sealing groove structure step 34 which transversely protrudes from the optical window installation positioning surface 33 is arranged below the optical window installation positioning surface 33; below the first seal groove formation step 34 is a clamping ring mounting surface 35, on which screw holes for fastening the clamping ring 2 to the interface 3 are radially provided. The base connection end is provided with a pod mounting interface 36 for connecting to a photovoltaic pod base. The height and thickness of the optical window mounting fitting surface 31 are designed according to the principle that the mounting strength of the interface member 3 and the optical window 1 is guaranteed, and the movement of a mechanism in a hanging cabin in the optical window 1 is not influenced, wherein the thickness is usually not less than 1.5mm, and the height is usually not less than 6 mm. In some embodiments, the interface 3 is made of an aluminum alloy, such as 7075 aluminum alloy.

Fig. 5 is a sectional view showing the positional relationship of the optical window 1 and the interface member 3 after they are mounted together according to the first embodiment of the present invention. The mounting boss 11 on the optical window 1 is flatly arranged on the optical window mounting positioning surface 33 on the interface member 3, and the opening end of the optical window 1 is matched with the optical window mounting end on the interface member 3 through a shaft hole, so that the mounting precision is ensured.

Fig. 6 is a sectional view showing the positional relationship after the mounting of all the components of the first embodiment of the present invention is completed, with the addition of the pressing ring 2 as compared with fig. 5. The optical window pressure welding surface 23 on the pressing ring 2 is flatly arranged on the mounting boss 11 on the optical window 1. The pressing ring 2 is fixed on the outer side surface of the interface piece 3 in a spigot matching mode and is fastened by screws.

The second embodiment of the invention provides another novel photoelectric pod optical window mounting structure, which comprises an optical window 1, an interface piece 3 used for mounting the optical window 1 and connecting with a photoelectric pod mounting base, and a pressing ring 2 used for fastening the mounting positions of the optical window 1 and the interface piece 3, and the difference between the structure and the first embodiment is that an annular sealing groove is not arranged on an optical window mounting matching surface 31 of the interface piece 3. Referring to fig. 7, the interface member 3 of the present embodiment has a cylindrical shape as a whole, and has one end serving as an optical window mounting end and the other end serving as a base connection end. The top end part of the outer side surface of the optical window mounting end is a conical optical window mounting matching surface 31; the lower part of the light window mounting matching surface 31 is a light window mounting positioning surface 33 which transversely protrudes out of the light window mounting matching surface 31; a first sealing groove structure step 34 which transversely protrudes from the optical window installation positioning surface 33 is arranged below the optical window installation positioning surface 33; below the first seal groove formation step 34 is a clamping ring mounting surface 35, on which screw holes for fastening the clamping ring 2 to the interface 3 are radially provided. The base connection end is provided with a pod mounting interface 36 for connecting to a photovoltaic pod base. The interface piece 3 is connected with the photoelectric pod base in a spigot matching mode and is fastened by screws, and the photoelectric pod base and the pod mounting interface 36 are sealed by rubber sealing rings.

The third embodiment of the present invention provides a method for installing a novel photoelectric pod optical window installation structure, which is as described in the first embodiment of the present invention, and the method includes the following steps:

step S1, completely filling the second annular sealing groove 32 on the interface member 3 with silicone rubber;

step S2, aligning the conical mounting and positioning surface 12 on the optical window 1 with the optical window mounting and positioning surface 31 on the interface 3, so that the opening end of the optical window 1 and the optical window mounting end on the interface 3 form a shaft hole to be matched to mount the optical window 1 in place, that is, the mounting boss 11 on the optical window 1 is flatly dropped on the optical window mounting and positioning surface 33 on the interface 3;

step S3, the first sealing groove formed by the lower surface of the mounting boss 11 and the first sealing groove structure step 34 on the interface member 3 is completely filled with silicone rubber, and after completion, the first sealing groove is left standing for a period of time until the silicone rubber is completely cured, for example, the first sealing groove structure step is left standing for about 12 hours;

step S4, the optical window crimping matching surface 21 on the pressing ring 2 is perfectly matched with the pressing ring mounting matching surface 13 on the optical window 1, and then the pressing ring 2 is mounted in place, namely the optical window boss crimping surface 23 on the pressing ring 2 is flatly dropped on the mounting boss 11 on the optical window 1;

in step S5, a slotted countersunk head screw is installed on the connection fastening surface 24 of the pressing ring 2 to connect and fasten the pressing ring 2 and the interface 3, thereby completing the installation.

A fourth embodiment of the present invention provides another installation method for a novel optical window installation structure of an optoelectronic pod, which is as described in the second embodiment of the present invention, and the installation method includes the following steps:

step S1, aligning the conical mounting and positioning surface 12 on the optical window 1 with the optical window mounting and positioning surface 31 on the interface 3, so that the opening end of the optical window 1 and the optical window mounting end on the interface 3 form a shaft hole to be matched to mount the optical window 1 in place, that is, the mounting boss 11 on the optical window 1 is flatly dropped on the optical window mounting and positioning surface 33 on the interface 3;

step S2, the first sealing groove formed by the lower surface of the mounting boss 11 and the first sealing groove structure step 34 on the interface member 3 is completely filled with silicone rubber, and after completion, the first sealing groove is left standing for a period of time until the silicone rubber is completely cured, for example, the first sealing groove structure step is left standing for about 12 hours;

step S3, the optical window crimping matching surface 21 on the pressing ring 2 is perfectly matched with the pressing ring mounting matching surface 13 on the optical window 1, and then the pressing ring 2 is mounted in place, namely the optical window boss crimping surface 23 on the pressing ring 2 is flatly dropped on the mounting boss 11 on the optical window 1;

in step S4, a slotted countersunk head screw is installed on the connection fastening surface 24 of the pressing ring 2 to connect and fasten the pressing ring 2 and the interface 3, thereby completing the installation.

In some embodiments, the silicone rubber used to fill the sealing groove is 704 black silicone rubber.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.